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How To Load Data through External Tables
How To Load Data through External Tables? - Oracle DBA FAQ - Loading and Exporting Data If you have data stored in external files, you can load it to database through an external table by the steps below: Create an external table with columns matching data fields in the external file. Create a regul... 2007-04-30, 5229👍, 0💬

How To Define a Variable to Match a Table Column Data Type
How To Define a Variable to Match a Table Column Data Type? - Oracle DBA FAQ - Working with Database Objects in PL/SQL If you have a table, and want to define some variables to have exactly the same data types as some columns in that table, you can use table_name.column_name%TYPE as data types to de... 2007-04-26, 5227👍, 0💬

What Is PL/SQL
What Is PL/SQL? - Oracle DBA FAQ - Introduction to PL/SQL PL/SQL is a modern, block-structured programming language. It provides several features that make developing powerful database applications very convenient. For example, PL/SQL provides procedural constructs, such as loops and conditional sta... 2007-04-25, 5226👍, 0💬

How To Drop an Existing Table
How To Drop an Existing Table? - Oracle DBA FAQ - Managing Oracle Database Tables If you want to delete an existing table and its data rows, you can use the DROP TABLE statement as shown in this script: SQL> connect HR/fyicenter Connected. SQL> CREATE TABLE emp_dept_10 2 AS SELECT * FROM employees W... 2007-05-03, 5225👍, 0💬

How To Experiment a Data Lock
How To Experiment a Data Lock? - Oracle DBA FAQ - Understanding SQL Transaction Management If you want to have some experience with data locks, you can create two windows runing two SQL*Plus sessions. In session 1, you can run a UPDATE statements to create a data lock. Before committing session 2, s... 2007-04-17, 5221👍, 0💬

What Is a User Role
What Is a User Role? - Oracle DBA FAQ - Managing Oracle User Accounts, Schema and Privileges A user role is a group of privileges. Privileges are assigned to users through user roles. You create new roles, grant privileges to the roles, and then grant roles to users. 2007-05-02, 5220👍, 0💬

What Is an Oracle Data File
What Is an Oracle Data File? - Oracle DBA FAQ - Managing Oracle Tablespaces and Data Files An Oracle data file is a big unit of physical storage in the OS file system. One or many Oracle data files are organized together to provide physical storage to a single Oracle tablespace. 2007-05-04, 5219👍, 0💬

How To Start Instance with a Minimal Initialization Parameter File
How To Start Instance with a Minimal Initialization Parameter File? - Oracle DBA FAQ - Creating New Database Instance Manually The sample initialization parameter file provided by Oracle seems to be not working. But we can try to start the new instance with a minimal initialization parameter file (P... 2007-04-23, 5219👍, 0💬

How To Use Subqueries with the EXISTS Operator
How To Use Subqueries with the EXISTS Operator? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements A subquery can be used with the EXISTS operator as "EXISTS (subquery)", which returns true if the subquery returns one or more rows. The following statement is a good example of "EXISTS (subq... 2007-04-19, 5218👍, 0💬

How To Start a Specific Oracle Instance
How To Start a Specific Oracle Instance? - Oracle DBA FAQ - Creating New Database Instance Manually A simple way to start a specific Oracle instance is to start the instance with the PFILE option as shown in the following example: >.\bin\sqlplus /nolog SQL> CONNECT / AS SYSDBA Connected. SQL> STARTU... 2007-04-23, 5215👍, 0💬

How To Run PL/SQL Statements in SQL*Plus
How To Run PL/SQL Statements in SQL*Plus? - Oracle DBA FAQ - Introduction to Command-Line SQL*Plus Client Tool If you want to run a single PL/SQL statement in SQL*Plus, you need to use the EXECUTE command as shown in the following tutorial example: SQL> SET SERVEROUTPUT ON SQL> EXECUTE DBMS_OUTPUT.P... 2007-04-29, 5214👍, 0💬

How To Use SQL Statements in PL/SQL
How To Use SQL Statements in PL/SQL? - Oracle DBA FAQ - Introduction to PL/SQL SQL DML (Data Manipulation Language) statements can be included in PL/SQL code blocks directly without any changes. See the script below for examples: SQL> CREATE TABLE tip (id NUMBER(5) PRIMARY KEY, 2 subject VARCHAR(80)... 2007-04-25, 5213👍, 0💬

What Happens If You Set the SGA Too Low
What Happens If You Set the SGA Too Low? - Oracle DBA FAQ - Introduction to Oracle Database 10g Express Edition Let's you made a mistake and changed to SGA to 16MB from the SYSTEM admin home page. When you run the batch file StartDB.bat, it will return a message saying server stated. However, if you... 2007-04-24, 5212👍, 0💬

How To Shutdown Your 10g XE Server from Command Line
How To Shutdown Your 10g XE Server from Command Line? - Oracle DBA FAQ - Introduction to Oracle Database 10g Express Edition You can shutdown your 10g XE server from command line by: Open a command line window. Change directory to \oraclexe\app\oracle\product\1 0.2.0\server\BIN\.Run StopDB.bat. The ... 2007-04-24, 5212👍, 0💬

How To Run CREATE DATABASE Statement
How To Run CREATE DATABASE Statement? - Oracle DBA FAQ - Creating New Database Instance Manually This is Step 7. Oracle Administrator Guide provided a sample CREATE DATABASE statement. But it is a long statement. You can modify and same it in a file, $ORACLE_HOME/configscripts/cre ate_database_fyi.sq... 2007-04-23, 5212👍, 0💬

How To Add a New Column to an Existing Table with a Default Value
How To Add a New Column to an Existing Table with a Default Value? - Oracle DBA FAQ - Managing Oracle Database Tables If you want to add a new column to an existing table, and insert a default value in this column on all existing data rows, you can use the ALTER TABLE ... ADD statement with the DEFA... 2007-05-03, 5211👍, 0💬

How To Convert Characters to Times
How To Convert Characters to Times? - Oracle DBA FAQ - Understanding SQL Basics You can convert dates to characters using the TO_CHAR() function as shown in the following examples: SELECT TO_CHAR(TO_DATE('04:49:49', 'HH:MI:SS'), 'DD-MON-YYYY HH24:MI:SS') FROM DUAL; -- Default date is the first day o... 2007-04-23, 5211👍, 0💬

How Remove Data Files befor opening a Database
How Remove Data Files befor opening a Database? - Oracle DBA FAQ - Managing Oracle Tablespaces and Data Files Let's say you have a corrupted data file or lost a data file. Oracle can mount the database. But it will not open the database. What you can do is to set the bad data file as offline befor o... 2007-05-02, 5209👍, 0💬

How To Grant CREATE SESSION Privilege to a User
How To Grant CREATE SESSION Privilege to a User? - Oracle DBA FAQ - Managing Oracle User Accounts, Schema and Privileges If you want give a user the CREATE SESSION privilege, you can use the GRANT command. The following tutorial exercise shows you how to grant DEV the privilege to connect to the ser... 2007-05-02, 5209👍, 0💬

How To Rollback the Current Transaction
How To Rollback the Current Transaction? - Oracle DBA FAQ - Understanding SQL Transaction Management If you have used some DML statements updated some data objects, you find a problem with those updates, and you don't want those updates to be permanently recorded in the database, you can use the ROL... 2007-04-18, 5208👍, 0💬

How To Invoke the Original Export Import Utilities
How To Invoke the Original Export Import Utilities? - Oracle DBA FAQ - Loading and Exporting Data If you really want to run the original export import utilities, you can still go to "bin" directory of the Oracle server path and run the "exp" or "imp" command. The tutorial exercise below tells you ho... 2007-05-02, 5207👍, 0💬

What Is an Oracle Tablespace
What Is an Oracle Tablespace? - Oracle DBA FAQ - Managing Oracle Tablespaces and Data Files An Oracle tablespace is a big unit of logical storage in an Oracle database. It is managed and used by the Oracle server to store structures data objects, like tables and indexes. 2007-05-04, 5204👍, 0💬

What Are the Execution Control Statements
What Are the Execution Control Statements? - Oracle DBA FAQ - Introduction to PL/SQL PL/SQL supports three groups of execution control statements: IF Statements - Conditionally executes a block of statements. CASE Statements - Selectively executes a block of statements. LOOP Statements - Repeatedly ... 2007-04-25, 5204👍, 0💬

How Many Anonymous Blocks Can Be Defined
How Many Anonymous Blocks Can Be Defined? - Oracle DBA FAQ - Introduction to PL/SQL An anonymous block is stored in the user's current session without any name. So you can only define one anonymous block at any time. If you define another anonymous block, the new block will replace the previously de... 2007-04-25, 5204👍, 0💬

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.NET C C++ CSS DBA General HTML Java JavaScript JSP JUnit MySQL Networking Oracle Perl Perl PHP PL/SQL RSS Software QA SQL Server Struts Unix Windows XHTML XML